Britain\'s Prince Harry\'s mystery girlfriend has been revealed as Cressida Bonas after the pair were spotted partying together in London. The 27-year-old British royal was spotted embracing the 23-year-old model - the daughter of 60s cover girl Lady Mary-Gaye Georgiana Lorna Curzon - at an after party following the European premiere of \'The Dark Knight Rises\' last week London\'s BFI IMAX in Waterloo. Cressida joined Harry, his cousin, Princess Eugenie and Eugenie\'s boyfriend Jack Brooksbank for the official post-premiere bash at Freemasons\' Hall in Covent Garden, alongside the movie\'s stars including Anne Hathaway and Tom Hardy. The royals and their friends then moved on to Le Salon nightspot in Mayfair where Harry was spotted kissing the beautiful blonde. A source told the Sun newspaper: \"Harry and the group danced their socks off but he was never far away from the stunning blonde. At one stage he was sitting down playing with her hair before finally leaving just after 4am.\" DJ Erol Sadadosh tweeted: \"Still DJing at Salon, Scotland Yard playing foosball in the corner, Prince Harry getting jiggy in the corner.\" However, the pair made sure they weren\'t spotted leaving the club together, in a bit to keep their romance under wraps. The source added: \"The girls came out first and Harry emerged about five minutes later. \"She and Harry got into different cabs though and obviously went their separate ways.\"